It is a grave mistake to theorize before one has data.
在尚未掌握数据资料之前建立理论，是一种严重的错误。
It is a grave mistake to theorize before one has data.
在没有证据之前就得出理论，是重大错误。
One could theorize that there is a purpose to taking creative license with history.
可以推断，用历史来创造有一定的目的性。
You've probably known people who research and theorize endlessly, but never get anything done.
你可能经常会听说某些人不停的进行研究和推理，但是一事无成。
Some researchers theorize that calcium must be taken during exercise to be most effective.
一些研究人员认为，必须在运动期间摄入钙质才最有效。
Some researchers theorize that calcium must be taken during exercise to be most effective.
一些研究人员认为，必须在运动期间摄入钙质才最有效。
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